Bolt anchor



oct. 2,1923. f 1,469,666

H. W. PLEISTER ET AL BOLT ANCHOR Filed June 17. 1922 2 Sheets-Sheet 1oct. 2, 1923. 1,469,666

H. W. PLEISTER ET AL BOLT ANCHOR 2 sheets-sheet 2 Filed June 17. 1922,Ary

* NHTE s'rr PATEN I ,HENRY WrLEIsTER, or WEsTrIELn, AND JOHNKARITZKY, F'cinr'wto013,.;Niliwim'n7 y sEY; SAID rLnIsTER AssIGNon- To HENRY 13.ANEWHALL YAND SAID KA- RrTZKY As-v f. l

` Vin connection with the accompanying drawy Patented Oct. 2, 1923.

SIGNOR To HENRY B. NEWHALL As EXEoUronoF H ENRYB. NEWHALL, SB.;,DE-

CEASED. l

Application laviunei i922. j seiialno. 569,129. j

To alliez/#hom t may concern: i

Beit known'that we, HENRY yW.1I LnIs' 1fiiR, a citizen of the UnitedStates, residinV at' Westfield, in the county of UnionV and tate of NewJersey, and JOHN KARITZKY, a lcitizenj fof the United States,fresidingat Garwood, inthe county of Union'and (State of New Jersey, .have madecertain' new and useful Improvements in' Bolt Anchors,` of' which thefollowing is a specication taken ings.

' roL'r Arterien;

. 'Our invention lrelates to ybolt anchors."

Y portion undercompression so-that'the metal More particularly itrelates to la'. .ductile shield! adapted to haveja portion of the shieldplafced under tension, .and another of the shield will "iow intothelvo'ids and irregularities of the surface of the hole within whichthe shield. is'mounted.Vv

Our inventionffurther relates to a 'ductile Y shield provided 'with avtapered and-aconnected cylindrical bore there being a stop'or Vshoulderbetween the two bores.

O ur invention furtherrelates to such 'a bolt anchor in which' theshield and cone, o'r expanding member, are 'formed of materials ofdifferent strength, the expanding cone beingof greaterrhardness and lessductility than the shield.

'- jfOur invention `furtherv relates to Vforming the shieldjo't some'ductilematerialyas aluywhen it is expanded 'themetal willl How,

' more or less, intothe irregularities and voids of. the wall or' thehole.H The expandingcone isformed of'some hardermaterial, as forexample, `1ron,'wh1ch 'may Ior may not 'he` galvanized.

Our invention i' fnrther relates to certain combinations, 'details ofconstructions, and

articles of manufacture, which willfbemore. fully hereinafter describedand pointed out.- Q Yin the claims. Y'

Ourinventlon may be applied to different 'forms of ductile shields. vWehave shown the 'drawings several vdii'erent forms ofisuchshields,althou-h it is to be particularly uni i derstood that t ese areshown by way of 'exi v ample and 'that our invention is lnot vto belimited thereto. inthe accompanying drawings the saline the shield andexpanding member shownlin '95e refereneefnumerals' refer to similarparts-` in i 0f our bolt anchor located therein andtprior to beingexpanded,V Y

Figa@ is a view slmilar Vto showing the duetile shield after ithasbeenexpanded Fig. 3 is a horizontal section through theVl shield :andexpanding memberfshown-jin Fig. 1;' f Fig". ele-is an end elevation oftheshield show-n in'Fig. l; *l

formV of ductile Shield;

mod'i.;

Asection on the' line 8 0.

l Figli isa. vertical section through a'wall o r other suitable supportshowinglgthe ductileshield of Fig." 9^inits operative'or expandedposition; f l: f "l -"Fig, 12 isa side elevation ofstilllanotliermodification in' which two expanding meml bers are used';`:v i Fig.`l3is a vertical section on the linef Wallo'r'otherlsnitable supportshowing'the ur 'invention broadly covers afdu'ctile` Y shield which isadapted yto beeXpande'dby;

placing aportion of theshield-nnder tension f 1 101)- H and anotherportionunder compression.`

"Our invention also broadly .covers ,af 'duce l' tile shield havingf'ataperedbore anda cylindricalfb'ore, there being a 'stop or. shoulder orY other member. stoppingtle enpandingniem- Y j bei' operating in thetapered bore, from cooperating withrtlie Vcylindrical bore eze ceptunder certain conditions. This insures that there will be'iirst atension of' the metal andan expansion at the end of the ductile -shieldin whichthe taperedbore islocated.

This is usually et the inner end removed from the face of the wall orother suitable After a portion of the ductileTV supportrl. shield hasbeen expanded by the expanding member Cooperating with the tapered bore,the ductile shield is then further expanded by yplacing4 another portionof the` ductile shield under compression, which will/ cause the shieldtorbe shortened in length but ini creased: in diameter. This results-intwo separate and distinct expansions of the duc;

tile metal both of which add tothe yhold or gri-.p of the bolt anchor orshieldrwithin the hole 2 of the wall or other suitable support 1'.-

It is well known that in drilling` a hole 2,

. in a wall or other suitable support 1,of manufactured stone or brick,cenientor natural stone, there is a certain dislodgnient of pebblesoilsand andhnrd particles. constl y ing the mass. ln oiir` invention weins e that` the vinner Vend V5 Soft the shield 1l iwillfill up all theseinequalities or voids .in the-surface of the hole 2 thatilie adjacentthexeiidV The expansion at ythe i-iliner end maybe made inenyjsuitablemzinneigsiich as by the threaded cone 5 cooperatingwith the screwthreadsupon the bolt or screw 6.V 4llfiis/cone cooperates with a tapered bore 7and with a screwY orbolt 6 which passes ,throughthe cylindrical bore 8,afterhaving beenglii'st tation,.fof-the'bolt or screw. G. pleces thatYportion ofthe metal of theshieldd between the stop or-shoulderv12 andthe end 13,;Fig; 3,.- under compression, which servesf. to slightlyshorten the length of the .shield t sind at the saine time increases.its diameter,

sot-hat throughout practically the cntirecir` cumference ofrtheshield,first by exerting tension and then compression, themetal 4williowradially and i'ill up the voids and irregularities in the` wallsV ofthe hole. 2.. By

forcing-the metal of; the diictile l,shieldvtiov flow... into theseinequalitiesor irregularities or voids ...we obtain particularly strong`union or 'hold Vwith the ywallorcther suitabe support, our bolt anchormaking a much holt. `G, in

stronger union or hold than bolt anchorsv of the saine size now on themarket. 1n Fig. 2, and' inv some ofthe other. figures, the

expansion or i'iowing of the metal of the X shield into the inequalitiesorV voids of the.

wall 2 has been purposely cicaigerated to more clearly illustrate theinvention. i A

rl`he particular contour andshape of the ductile shield may vary. lehave shown in the drawings several different forms of ductile shields.For example in Figs. Y1 to 5, the ductile shield.' 4l is provided with aplurality of integral members or tines 15, 16,`r

connected together byv integral webs 17, 17 of less thickness thantheti'n'es 15 andy 16 forming' grooves 18,18. 1.5: I

lWhen the hole 2 is. correctly drilled so that the ductile shield 4`will jnst iituthehole 2, the expansion shield Vmay he expanded `bysimply stretching the webs 17, 17 ftoex'pand theintegral tines 15 and16. ln other. cases,

when the hole 2 is a littlelarge, or the riiallsy orother supportsl aresoft, and. fiillvfrir;

regularities or voids then, thel web 17 will be fractured orl brokenwhen thetinesl andl-1 are .expanded as shown in Fig. 2.

ln Figs, 7r and 8,'- we haves'lidlwif Inother modification of the forniofthe cliifctile shield. ln this' modiiricetion :the` du'cpi eshielde18. is provided 1witlitwo sepA rate and distinct tines 19 and20,'havingwslot`s bore8-7- ln` this Vfo'rm o f ourinvention', theseparate,and` distinct: tii'ies V19aii` d, 20` vnre connectedtogetherpbydmeans of a dovetail 22y on one tine, ,connectingfwith adovetail 215 2.1" Xteiiding from the periphery totli'e'axialsioteainiiis @therese Tirsosrsees 0i expandingtlie diictile'shield 1 8thefsaine as that previously de cribechex ept th this ,form theexpanding ineinbenor cf movingvdo-ivnthe tapered boire/.7, `will ex@Ypand the ends of the tinesv 19fei1d20; unless the .hole 2 isY perfectly='d iilled willV breal: or .fl'actu 4the,dovetail .ioiiitw22f and.2,3,fes'Y shownI in Fig. Asso'on astl'ieeiid of thecone i1 reaches thestop` or Asliblilei' l2, the rest of the iiietal ofthe duetileslii/eld1,8is putuiClrcOllPression and willshorten the shield .and .increase itsdiameter .the manner fully described in vconnection Ywith" the firstVforni. Y `Y ln Figs. 9,.,1Qrand111 we Ihave.y'slioii/ n a still inrtherniodicatidiiofoiir invention, inwh iclh theY ductileshielyd 2li isformed Oris Single.iitesrel,niiiibelxtlleinetl lf th' shield being siichas vto permit the YeXpansion of ,the end 25,;and. the Yincrease.A'iiidiaiietei of "the,Y yshield, :froinfabout-.the 4point 26 to .the end27.` without having tines. or other parte.

Y connected byV webs ethenbrealrable .'mein bers. in this formofourinvention -tli'ecoiie 5 will place the yinstal inthe end 25ifii'i'cfler` tension to expand it'until cojiie Vreaches the stoporlshouldeiz12', fromy which'. point the cone will place the nietel of'the shield,

between the points 26 ryand27, under com-' pression and expand itzradially Vinto the;

voids and inequalities ofthev surface of the -hole2V as shown in Figi"11; l

. In,Figs."12,l13 and laws havev shown another moditicationof ourinvention, in which Y the Yductile shield 28 is Vformed; with twotapered bores 7, Y endingIi'n stops or l.shoulders 1'2, 12, the twotapered bores being connected by a single cylindrical bore-29. Withinthe inner taperedbore 7 we mount the'V same conical screw-threaded cone5. Within the other tapered bore 7 we mount an unthreaded cone 30. Inthis form ofV our invention, the bolt or screw 6 is passed through theworlr 9, thence through the unthreaded cone 30, cylindrical bore 29V andinto the screw-threads of thecone 5. .B y

rotating the head 10 of the bolt or nut 6,

the cone 5 is caused lto move down its tapered bore 7, which at the sametime .causes the ductile shield 28 to move up the cone 30,v

.the work being held between `the 'cone 30 andthe head of the nut orscrew 10. yThe effect is to cause the conel 30 to also move down orcooperate with Vits tapered bore 7 lWhen -the end l1 of the `cone 5reaches its shoulder or stop 12, and When the end 31 of the unthreadedcone 30 reaches the shoul-v der Vor. stop 12 on the right of'Fig.- 12,further movement along the different tapered bores 7, 7 is arrested.Further rotation ot the nut or bolt 6 willthen cause the metal of theshield between' the stops Vor Yshoulders 12, 12 to becompressed,'which.will tend to shorten the length of the shield 2 8 andat the same timeincrease its diameter, permitting. Ythe ductile metal tofill up all the voids and inequalities within the surface ofthe 2 in thewall 1.

Infthis particular form yoif shield 28,`we have shown it provided with agroove 32 and a 'breakable web 33, the same as shown hole in Figs. 1.andv 2.0i? the drawings, though' of course it is to fbe understood thatthe particular formof shield may be varied.

In Figure 15 we have shown a vertical section of Figure 2, in vwhich theend yof the.

stop

conical nut 5 is 'shown forced past' the 12' and into the cylindricalbore 8.

In all formsY of our invention illustrated, the ductile shields are soformed lthat the expanding member Vor conef5, or cones 5 and 30 of Fig.12, can be securely held within the ductile shield by friction, by.simply giving them a slight tap or blow, which insures that the cones orexpanding members and shields will not become. discon-A nected fromvibrations in transportation 'or through rough handling, therebyobviating A the necessity of the lpurchaser or jobber going vover theshipment to see whether or not all the bolt anchors are properlyassembled and held together and to reassemble such as have comeseparated `during transit.

While ywe preferably-.use my. invention witl'i such shields, it is ofcourse to be .understood that other forms of shields maybe .usedland I.

those illustrated *and` described. f.

that ourinventionis not tozbe 'limited to;7 'n

if 0 Y Having thus; described this; invention" .ini

connection with illustrative 'embodiments thereof, to the A"details ofwhich we do-,notl desireto be. limited, what i-s claimed as newv andwhat is `desired to securey by Letters Patent is set forth'. in theappended claims. Whatwe claimis:-. Y 1. A'new article of manufacturecomprise ing a ductile shield having' a plurality of separated partsconnected together andl provided with a tapered bore and a cylindrical,bore there being a shoulder between lthe two bores.

2. A new article of manufacture compris ing a ductile shield having apluralityv ofV soV 'separated parts connected together by break'- ablemeans and provided with` a'tapeied bore and a cylindrical bore `therebeing a shoulder between theY two bores. 1

3. A new article of manufacture comprisand Yan interposed cylindrical"`bore there beingr shoulders between thetapered bores Y and thecylindrical bore.

4. A boltganchor comprising" a ductile" eo iing a ductile shield'havingHVa plurality of. Y .Y p Ytapered .boresone at cachend ofthefshieldshield having'V a 4tapered `and `cylindrical bore, a'conical nut.adapted to enter theA f tapered bore, .means to retardY the conicalnut:from enteringgthe cylindrical. bore V1ooexcept on excessive expandingpressure, and

means to cooperate with. the screwthreadsffz of the nut to `operatethepbolt anchor.

cooperatevWith thescrewthreads lofthe nut to operate the bolt anchor. v

6. A bolt anchor comprising 'a ductileA Atapered' n bore, anv expandingmember adapted to enter both shield 'f having both an expanding' boreandan expanding cylindrica the tapered and cylindrical expanding bores,5

when the maximum holding effect is desired.

u 7. bolt anchor comprising a ductile vshield having both an .expandingtapered V bore andan expanding cylindrical bore, an,`

expanding member adapted lto enter both the tapered and cylindricalexpanding bores, and a stop to retard said expanding memberk fromentering the cylindrical bore except land means to retard said expandingmember 1 from entering Vthe cylindrical bore excepty when themaximumholding effect is desired; Y

connected .expansible' parts fandv Vprovided i 8.1 A boltA anchorcomprising a ductile i i Shield having a Pluralityof Separated-and"13e`with: wtalpeed ad cylindrical bore havingdrca-l bore, andtwoexpzmdngmembers;

a;lstepybefwveenzfthgz-twp bores, and-'an -exf adapted to cooperate'wththe tapered bores pandingimxmberf aadaptedtorcooperate' with andW-ththetwo stops of shoulders.

' 'the tapered bore-andewth; midst-op. HENRY W. PLEISTER.

5 9, A bolt andorvcomprfsng; a duetle.- VJOHN KARITZKY,

sheldzhwvn-g a: pluralityY ofexpansble parts Ttnesses Y andi` having-tw@taipelzedboresf 011e1=a=t each: Y MARY R. RYAN' and; o'thfeishelrclg-.acylndrcah bor-e1 connect- H. LWLVILLIAMS, Y in'gvzsaifd 'taperedbol-esgshouders 011 stops be- Y L HESSLET, 10'l tweef.thtwu'tzvpenedbares-'and thf cylin-l EMIL BETZ;

